Linux Blog

CAL

NAME

SYNOPSIS

DESCRIPTION

Cal
displays a simple calendar.
If arguments are not specified,
the current month is displayed.
The options are as follows:

-1

Display single month output.
(This is the default.)

-3

Display prev/current/next month output.

-s

Display Sunday as the first day of the week.
(This is the default.)

-m

Display Monday as the first day of the week.

-j

Display Julian dates (days one-based, numbered from January 1).

-y

Display a calendar for the current year.

A single parameter specifies the year (1 - 9999) to be displayed;
note the year must be fully specified:
``cal 89
''
will
not
display a calendar for 1989.
Two parameters denote the month (1 - 12) and year.
If no parameters are specified, the current month's calendar is
displayed.

A year starts on Jan 1.

The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd
of September.
By this time, most countries had recognized the reformation (although a
few did not recognize it until the early 1900's.)
Ten days following that date were eliminated by the reformation, so the
calendar for that month is a bit unusual.